/Engine/Source/Runtime/MovieScene/Public/Evaluation/PreAnimatedState/MovieScenePreAnimatedStateExtension.h
Pre-animated state extension that houses all cached values for objects animated by a specificUMovieSceneEntitySystemLinker- The presence of this extension denotes that pre-animated state should be stored in one form or another.
     If the extension is not present, this implies that there are no IMovieScenePlayers that need global Restore State, and no tracks set to 'Restore State'.
     FPreAnimatedStateExtension::NumRequestsForGlobalState defines whether this extension needs to cache any and all changes or not
struct FPreAnimatedStateExtension
uint32
NumRequestsForGlobalState
The number of requests that have been made to capture global state - only one should exist per playing sequence